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57633
@57633
July 2022
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Упростите выражение (4b-1)(4b+1)-(4b-1) в квадрате
И найдите его значение при b=-4
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Санечка69
Verified answer
(4b - 1)(4b + 1) - (4b - 1)
² = 16b² - 1 - (16b² - 8b + 1) = 16b² - 1 - 16b² + 8b - 1 = 8b - 2
при b = -4 получим: 8
· (-4) - 2 = -32 - 2 = -34
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Verified answer
(4b - 1)(4b + 1) - (4b - 1)² = 16b² - 1 - (16b² - 8b + 1) = 16b² - 1 - 16b² + 8b - 1 = 8b - 2при b = -4 получим: 8 · (-4) - 2 = -32 - 2 = -34